He seems like a Ti-leading type. Star Wars, when it came out, was pretty representative of Alpha values, but also Beta ones (Ne and Se and Si and Ni), Gamma and Delta are impossible (the super-limited originality and effectiveness/long-term impact of systems-making in Te-valuing types). Maybe an LSI-Se, it's just that they usually aren't that "revolutionary" when it comes to visual arts as film directors and concept creators, but neither are LII really. And even in business you only see two or three anywhere near as original and successful as John D. Rockefeller once every few thousand years, if even that frequently. Still, George Lucas was pretty strong-willed and it's about wars and conflicts so I'm going with LSI-Se.